Originally Posted by
Jerry Peck
I'd have to check the actual wording, as I recall it more applies to projections from the walls below the water line, but those stools would create the same hazard.
From my ANSI/NSPI-5 1995 American National Standard for Residential Inground Swimming Pools: (the bold was there in the book)
5.8 Entrapment Avoidance: There shall be no protrusions or other obstructions in the swimming are, which may cause the entrapment or entanglement of the user.
Somewhere I had something worded differently, but that should cover it.